content: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package com.google.protobuf;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.ListIterator;
  import junit.framework.TestCase;
  
  /**
   * Tests for {@link UnmodifiableLazyStringList}.
   *
   * @author jonp@google.com (Jon Perlow)
   */
  public class UnmodifiableLazyStringListTest extends TestCase {
  
    private static String STRING_A = "A";
    private static String STRING_B = "B";
    private static String STRING_C = "C";
  
    private static ByteString BYTE_STRING_A = ByteString.copyFromUtf8("A");
    private static ByteString BYTE_STRING_B = ByteString.copyFromUtf8("B");
    private static ByteString BYTE_STRING_C = ByteString.copyFromUtf8("C");
  
    public void testReadOnlyMethods() {
      LazyStringArrayList rawList = createSampleList();
      UnmodifiableLazyStringList list = new UnmodifiableLazyStringList(rawList);
      assertEquals(3, list.size());
      assertSame(STRING_A, list.get(0));
      assertSame(STRING_B, list.get(1));
      assertSame(STRING_C, list.get(2));
      assertEquals(BYTE_STRING_A, list.getByteString(0));
      assertEquals(BYTE_STRING_B, list.getByteString(1));
      assertEquals(BYTE_STRING_C, list.getByteString(2));
  
      List<ByteString> byteStringList = list.asByteStringList();
      assertSame(list.getByteString(0), byteStringList.get(0));
      assertSame(list.getByteString(1), byteStringList.get(1));
      assertSame(list.getByteString(2), byteStringList.get(2));
    }
  
    public void testModifyMethods() {
      LazyStringArrayList rawList = createSampleList();
      UnmodifiableLazyStringList list = new UnmodifiableLazyStringList(rawList);
  
      try {
        list.remove(0);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
      assertEquals(3, list.size());
  
      try {
        list.add(STRING_B);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
      assertEquals(3, list.size());
  
      try {
        list.set(1, STRING_B);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
      assertEquals(3, list.size());
  
      List<ByteString> byteStringList = list.asByteStringList();
      try {
        byteStringList.remove(0);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
      assertEquals(3, list.size());
      assertEquals(3, byteStringList.size());
  
      try {
        byteStringList.add(BYTE_STRING_B);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
      assertEquals(3, list.size());
      assertEquals(3, byteStringList.size());
  
      try {
        byteStringList.set(1, BYTE_STRING_B);
        fail();
      } catch (UnsupportedOperationException e) {
        // expected
      }
      assertEquals(3, list.size());
      assertEquals(3, byteStringList.size());
    }
  
    public void testIterator() {
      LazyStringArrayList rawList = createSampleList();
      UnmodifiableLazyStringList list = new UnmodifiableLazyStringList(rawList);
  
      Iterator<String> iter = list.iterator();
      int count = 0;
      while (iter.hasNext()) {
        iter.next();
        count++;
        try {
          iter.remove();
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
      }
      assertEquals(3, count);
  
      List<ByteString> byteStringList = list.asByteStringList();
      Iterator<ByteString> byteIter = byteStringList.iterator();
      count = 0;
      while (byteIter.hasNext()) {
        byteIter.next();
        count++;
        try {
          byteIter.remove();
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
      }
      assertEquals(3, count);
    }
  
    public void testListIterator() {
      LazyStringArrayList rawList = createSampleList();
      UnmodifiableLazyStringList list = new UnmodifiableLazyStringList(rawList);
  
      ListIterator<String> iter = list.listIterator();
      int count = 0;
      while (iter.hasNext()) {
        iter.next();
        count++;
        try {
          iter.remove();
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
        try {
          iter.set("bar");
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
        try {
          iter.add("bar");
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
      }
      assertEquals(3, count);
  
      List<ByteString> byteStringList = list.asByteStringList();
      ListIterator<ByteString> byteIter = byteStringList.listIterator();
      count = 0;
      while (byteIter.hasNext()) {
        byteIter.next();
        count++;
        try {
          byteIter.remove();
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
        try {
          byteIter.set(BYTE_STRING_A);
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
        try {
          byteIter.add(BYTE_STRING_A);
          fail();
        } catch (UnsupportedOperationException e) {
          // expected
        }
      }
      assertEquals(3, count);
    }
  
    private LazyStringArrayList createSampleList() {
      LazyStringArrayList rawList = new LazyStringArrayList();
      rawList.add(STRING_A);
      rawList.add(STRING_B);
      rawList.add(STRING_C);
      return rawList;
    }
  }
  